ID help From Bangladesh

[Sabbir]

23487

Seow Sir,
Can you Please Confirm me about this Species is it , Charaxes aristogiton or Charaxes bernardus What is the Key Difference Between them .

Thanks for Ur help. Waiting for Your Replay.

Regards
Sabbir

[Psyche]

It should be Charaxes bernardus.
The Charaxes are cofusingly similar on the underside.

The key difference is
In C. aristogiton, the FW inner margin of the discal band is some distance from the cellend bar ( the double lines).
This is clearly seen in the drawing below & the corresponding pix. Also HW black line usually regular & sharply-defined.
http://fr.wikipedia.org/wiki/Charaxes_aristogiton#/media/File:HaridraAristogiton173_1a.jpg
http://www.flutters.org/home/photogallery/plog-content/images/butterfliesbrnbspnbspnbspnymphalidae-the-brush-footed-br/subfamily-charaxinae-brnbspnbspnbsp-genus-charaxes--the-rajahs-/scarce_tawny_rajah_1_ayan_chakraborty_3.jpg
http://www.ifoundbutterflies.org/sp/912/Charaxes-aristogiton

In C. bernardus the inner margin of the discal band(often yellow) is close to the cellend bar; HW black line often diffuse & irregular.
http://farm4.staticflickr.com/3474/3952444641_d818f34289.jpg
http://www.ifoundbutterflies.org/#!/sp/543/Charaxes-bernardus

In C. psaphon the inner margin of the band is similarly close to the cellend bar as in bernardus; HW black line irregular.
C. psaphon may be ID'ed by the inner margins of the band being less irregular or jagged (both wings) .
Add. clue: On the HW, the darker band just to the inside of the paler discal band ends more broadly on the inner margin(dorsum) ; shaped like an anvil in the other 3 species.
https://www.flickr.com/photos/anjanagunathilake/5652196635/
http://www.ifoundbutterflies.org/#!/sp/696/Charaxes-psaphon

TL Seow : Cheers.
PS. Also C. marmax, more ochreous; FW usually with submarginal pale spots; HW black line diffuse , irregular.
http://www.ifoundbutterflies.org/sp/914/Charaxes-marmax

[Sabbir]

Thanks a lot Seow Sir.

Regards
Sabbir

[Psyche]

Additional clue. In C. psaphon on the hindwing, the darker band inner to the paler discal band ends particularly broad on the inner margin (lowermost in pix).
In the other 3 species it is narrower & shaped like an anvil.
https://www.flickr.com/photos/anjanagunathilake/5652196635/

TL Seow:Cheers.

[Sabbir]

Thanks Seow Sir :cheers: